quiz5-10.40-soln. - MATH 101-B Fall 2004 Quiz 5 (...

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Unformatted text preview: MATH 101-B Fall 2004 Quiz 5 ( 10:40-12:30 Group) November 5, 2004 Time: 10 minutes Name: Student No: Follow the directions. No work No credit!! Problem. On which interval(s) is the function f x up? x4 4x 3 both decreasing and concave Solution. We must find the interval(s) on which f x is negative and f fx 4x 3 f 12x 2 x 12x 2 4x 2 x 3 24x 12x x 2 0 on ,3 , Note that fx f x 0 on 3, 0 on and f x ,0 2, Hence, f x is both decreasing and concave up on and f ,0 x 0 on 0, 2 . 2, 3 . x is positive. ...
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This note was uploaded on 03/24/2012 for the course MATHEMATIC 101 taught by Professor Many during the Spring '10 term at Sabancı University.

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